Find the odd one out from the following groups, giving reasons for your choice.
(a) bile, gastric juice, liver, pancreatic juice
(b) canine, molar, incisors, rumen
(c) stomach, roughage, intestine, liver
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Solution
(a) Liver is the odd one out as it is an organ, while the others are digestive juices.
(b) Rumen is the odd one out as it is a digestive organ, whereas the others are types of teeth.
(c) Roughage is the odd one out as it is food fibre, whereas the others are digestive organs.